1 /* 2 * wm8776.c -- WM8776 ALSA SoC Audio driver 3 * 4 * Copyright 2009 Wolfson Microelectronics plc 5 * 6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * TODO: Input ALC/limiter support 13 */ 14 15 #include <linux/module.h> 16 #include <linux/moduleparam.h> 17 #include <linux/init.h> 18 #include <linux/delay.h> 19 #include <linux/pm.h> 20 #include <linux/i2c.h> 21 #include <linux/of_device.h> 22 #include <linux/spi/spi.h> 23 #include <linux/slab.h> 24 #include <sound/core.h> 25 #include <sound/pcm.h> 26 #include <sound/pcm_params.h> 27 #include <sound/soc.h> 28 #include <sound/initval.h> 29 #include <sound/tlv.h> 30 31 #include "wm8776.h" 32 33 /* codec private data */ 34 struct wm8776_priv { 35 enum snd_soc_control_type control_type; 36 int sysclk[2]; 37 }; 38 39 static const u16 wm8776_reg[WM8776_CACHEREGNUM] = { 40 0x79, 0x79, 0x79, 0xff, 0xff, /* 4 */ 41 0xff, 0x00, 0x90, 0x00, 0x00, /* 9 */ 42 0x22, 0x22, 0x22, 0x08, 0xcf, /* 14 */ 43 0xcf, 0x7b, 0x00, 0x32, 0x00, /* 19 */ 44 0xa6, 0x01, 0x01 45 }; 46 47 static int wm8776_reset(struct snd_soc_codec *codec) 48 { 49 return snd_soc_write(codec, WM8776_RESET, 0); 50 } 51 52 static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1); 53 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1); 54 static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1); 55 56 static const struct snd_kcontrol_new wm8776_snd_controls[] = { 57 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL, 58 0, 127, 0, hp_tlv), 59 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL, 60 0, 255, 0, dac_tlv), 61 SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0), 62 63 SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0), 64 65 SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL, 66 0, 255, 0, adc_tlv), 67 SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1), 68 SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0), 69 SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1), 70 }; 71 72 static const struct snd_kcontrol_new inmix_controls[] = { 73 SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0), 74 SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0), 75 SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0), 76 SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0), 77 SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0), 78 }; 79 80 static const struct snd_kcontrol_new outmix_controls[] = { 81 SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0), 82 SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0), 83 SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0), 84 }; 85 86 static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = { 87 SND_SOC_DAPM_INPUT("AUX"), 88 89 SND_SOC_DAPM_INPUT("AIN1"), 90 SND_SOC_DAPM_INPUT("AIN2"), 91 SND_SOC_DAPM_INPUT("AIN3"), 92 SND_SOC_DAPM_INPUT("AIN4"), 93 SND_SOC_DAPM_INPUT("AIN5"), 94 95 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1, 96 inmix_controls, ARRAY_SIZE(inmix_controls)), 97 98 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1), 99 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1), 100 101 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0, 102 outmix_controls, ARRAY_SIZE(outmix_controls)), 103 104 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0), 105 106 SND_SOC_DAPM_OUTPUT("VOUT"), 107 108 SND_SOC_DAPM_OUTPUT("HPOUTL"), 109 SND_SOC_DAPM_OUTPUT("HPOUTR"), 110 }; 111 112 static const struct snd_soc_dapm_route routes[] = { 113 { "Input Mixer", "AIN1 Switch", "AIN1" }, 114 { "Input Mixer", "AIN2 Switch", "AIN2" }, 115 { "Input Mixer", "AIN3 Switch", "AIN3" }, 116 { "Input Mixer", "AIN4 Switch", "AIN4" }, 117 { "Input Mixer", "AIN5 Switch", "AIN5" }, 118 119 { "ADC", NULL, "Input Mixer" }, 120 121 { "Output Mixer", "DAC Switch", "DAC" }, 122 { "Output Mixer", "AUX Switch", "AUX" }, 123 { "Output Mixer", "Bypass Switch", "Input Mixer" }, 124 125 { "VOUT", NULL, "Output Mixer" }, 126 127 { "Headphone PGA", NULL, "Output Mixer" }, 128 129 { "HPOUTL", NULL, "Headphone PGA" }, 130 { "HPOUTR", NULL, "Headphone PGA" }, 131 }; 132 133 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 134 { 135 struct snd_soc_codec *codec = dai->codec; 136 int reg, iface, master; 137 138 switch (dai->driver->id) { 139 case WM8776_DAI_DAC: 140 reg = WM8776_DACIFCTRL; 141 master = 0x80; 142 break; 143 case WM8776_DAI_ADC: 144 reg = WM8776_ADCIFCTRL; 145 master = 0x100; 146 break; 147 default: 148 return -EINVAL; 149 } 150 151 iface = 0; 152 153 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 154 case SND_SOC_DAIFMT_CBM_CFM: 155 break; 156 case SND_SOC_DAIFMT_CBS_CFS: 157 master = 0; 158 break; 159 default: 160 return -EINVAL; 161 } 162 163 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 164 case SND_SOC_DAIFMT_I2S: 165 iface |= 0x0002; 166 break; 167 case SND_SOC_DAIFMT_RIGHT_J: 168 break; 169 case SND_SOC_DAIFMT_LEFT_J: 170 iface |= 0x0001; 171 break; 172 default: 173 return -EINVAL; 174 } 175 176 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 177 case SND_SOC_DAIFMT_NB_NF: 178 break; 179 case SND_SOC_DAIFMT_IB_IF: 180 iface |= 0x00c; 181 break; 182 case SND_SOC_DAIFMT_IB_NF: 183 iface |= 0x008; 184 break; 185 case SND_SOC_DAIFMT_NB_IF: 186 iface |= 0x004; 187 break; 188 default: 189 return -EINVAL; 190 } 191 192 /* Finally, write out the values */ 193 snd_soc_update_bits(codec, reg, 0xf, iface); 194 snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master); 195 196 return 0; 197 } 198 199 static int mclk_ratios[] = { 200 128, 201 192, 202 256, 203 384, 204 512, 205 768, 206 }; 207 208 static int wm8776_hw_params(struct snd_pcm_substream *substream, 209 struct snd_pcm_hw_params *params, 210 struct snd_soc_dai *dai) 211 { 212 struct snd_soc_codec *codec = dai->codec; 213 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 214 int iface_reg, iface; 215 int ratio_shift, master; 216 int i; 217 218 switch (dai->driver->id) { 219 case WM8776_DAI_DAC: 220 iface_reg = WM8776_DACIFCTRL; 221 master = 0x80; 222 ratio_shift = 4; 223 break; 224 case WM8776_DAI_ADC: 225 iface_reg = WM8776_ADCIFCTRL; 226 master = 0x100; 227 ratio_shift = 0; 228 break; 229 default: 230 return -EINVAL; 231 } 232 233 /* Set word length */ 234 switch (snd_pcm_format_width(params_format(params))) { 235 case 16: 236 iface = 0; 237 case 20: 238 iface = 0x10; 239 break; 240 case 24: 241 iface = 0x20; 242 break; 243 case 32: 244 iface = 0x30; 245 break; 246 default: 247 dev_err(codec->dev, "Unsupported sample size: %i\n", 248 snd_pcm_format_width(params_format(params))); 249 return -EINVAL; 250 } 251 252 /* Only need to set MCLK/LRCLK ratio if we're master */ 253 if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) { 254 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) { 255 if (wm8776->sysclk[dai->driver->id] / params_rate(params) 256 == mclk_ratios[i]) 257 break; 258 } 259 260 if (i == ARRAY_SIZE(mclk_ratios)) { 261 dev_err(codec->dev, 262 "Unable to configure MCLK ratio %d/%d\n", 263 wm8776->sysclk[dai->driver->id], params_rate(params)); 264 return -EINVAL; 265 } 266 267 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]); 268 269 snd_soc_update_bits(codec, WM8776_MSTRCTRL, 270 0x7 << ratio_shift, i << ratio_shift); 271 } else { 272 dev_dbg(codec->dev, "DAI in slave mode\n"); 273 } 274 275 snd_soc_update_bits(codec, iface_reg, 0x30, iface); 276 277 return 0; 278 } 279 280 static int wm8776_mute(struct snd_soc_dai *dai, int mute) 281 { 282 struct snd_soc_codec *codec = dai->codec; 283 284 return snd_soc_write(codec, WM8776_DACMUTE, !!mute); 285 } 286 287 static int wm8776_set_sysclk(struct snd_soc_dai *dai, 288 int clk_id, unsigned int freq, int dir) 289 { 290 struct snd_soc_codec *codec = dai->codec; 291 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 292 293 BUG_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk)); 294 295 wm8776->sysclk[dai->driver->id] = freq; 296 297 return 0; 298 } 299 300 static int wm8776_set_bias_level(struct snd_soc_codec *codec, 301 enum snd_soc_bias_level level) 302 { 303 switch (level) { 304 case SND_SOC_BIAS_ON: 305 break; 306 case SND_SOC_BIAS_PREPARE: 307 break; 308 case SND_SOC_BIAS_STANDBY: 309 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 310 snd_soc_cache_sync(codec); 311 312 /* Disable the global powerdown; DAPM does the rest */ 313 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0); 314 } 315 316 break; 317 case SND_SOC_BIAS_OFF: 318 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1); 319 break; 320 } 321 322 codec->dapm.bias_level = level; 323 return 0; 324 } 325 326 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 327 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) 328 329 static const struct snd_soc_dai_ops wm8776_dac_ops = { 330 .digital_mute = wm8776_mute, 331 .hw_params = wm8776_hw_params, 332 .set_fmt = wm8776_set_fmt, 333 .set_sysclk = wm8776_set_sysclk, 334 }; 335 336 static const struct snd_soc_dai_ops wm8776_adc_ops = { 337 .hw_params = wm8776_hw_params, 338 .set_fmt = wm8776_set_fmt, 339 .set_sysclk = wm8776_set_sysclk, 340 }; 341 342 static struct snd_soc_dai_driver wm8776_dai[] = { 343 { 344 .name = "wm8776-hifi-playback", 345 .id = WM8776_DAI_DAC, 346 .playback = { 347 .stream_name = "Playback", 348 .channels_min = 2, 349 .channels_max = 2, 350 .rates = SNDRV_PCM_RATE_CONTINUOUS, 351 .rate_min = 32000, 352 .rate_max = 192000, 353 .formats = WM8776_FORMATS, 354 }, 355 .ops = &wm8776_dac_ops, 356 }, 357 { 358 .name = "wm8776-hifi-capture", 359 .id = WM8776_DAI_ADC, 360 .capture = { 361 .stream_name = "Capture", 362 .channels_min = 2, 363 .channels_max = 2, 364 .rates = SNDRV_PCM_RATE_CONTINUOUS, 365 .rate_min = 32000, 366 .rate_max = 96000, 367 .formats = WM8776_FORMATS, 368 }, 369 .ops = &wm8776_adc_ops, 370 }, 371 }; 372 373 #ifdef CONFIG_PM 374 static int wm8776_suspend(struct snd_soc_codec *codec) 375 { 376 wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF); 377 378 return 0; 379 } 380 381 static int wm8776_resume(struct snd_soc_codec *codec) 382 { 383 wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 384 return 0; 385 } 386 #else 387 #define wm8776_suspend NULL 388 #define wm8776_resume NULL 389 #endif 390 391 static int wm8776_probe(struct snd_soc_codec *codec) 392 { 393 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 394 int ret = 0; 395 396 ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8776->control_type); 397 if (ret < 0) { 398 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 399 return ret; 400 } 401 402 ret = wm8776_reset(codec); 403 if (ret < 0) { 404 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 405 return ret; 406 } 407 408 wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 409 410 /* Latch the update bits; right channel only since we always 411 * update both. */ 412 snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100); 413 snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100); 414 415 return ret; 416 } 417 418 /* power down chip */ 419 static int wm8776_remove(struct snd_soc_codec *codec) 420 { 421 wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF); 422 return 0; 423 } 424 425 static struct snd_soc_codec_driver soc_codec_dev_wm8776 = { 426 .probe = wm8776_probe, 427 .remove = wm8776_remove, 428 .suspend = wm8776_suspend, 429 .resume = wm8776_resume, 430 .set_bias_level = wm8776_set_bias_level, 431 .reg_cache_size = ARRAY_SIZE(wm8776_reg), 432 .reg_word_size = sizeof(u16), 433 .reg_cache_default = wm8776_reg, 434 435 .controls = wm8776_snd_controls, 436 .num_controls = ARRAY_SIZE(wm8776_snd_controls), 437 .dapm_widgets = wm8776_dapm_widgets, 438 .num_dapm_widgets = ARRAY_SIZE(wm8776_dapm_widgets), 439 .dapm_routes = routes, 440 .num_dapm_routes = ARRAY_SIZE(routes), 441 }; 442 443 static const struct of_device_id wm8776_of_match[] = { 444 { .compatible = "wlf,wm8776", }, 445 { } 446 }; 447 MODULE_DEVICE_TABLE(of, wm8776_of_match); 448 449 #if defined(CONFIG_SPI_MASTER) 450 static int __devinit wm8776_spi_probe(struct spi_device *spi) 451 { 452 struct wm8776_priv *wm8776; 453 int ret; 454 455 wm8776 = devm_kzalloc(&spi->dev, sizeof(struct wm8776_priv), 456 GFP_KERNEL); 457 if (wm8776 == NULL) 458 return -ENOMEM; 459 460 wm8776->control_type = SND_SOC_SPI; 461 spi_set_drvdata(spi, wm8776); 462 463 ret = snd_soc_register_codec(&spi->dev, 464 &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai)); 465 466 return ret; 467 } 468 469 static int __devexit wm8776_spi_remove(struct spi_device *spi) 470 { 471 snd_soc_unregister_codec(&spi->dev); 472 return 0; 473 } 474 475 static struct spi_driver wm8776_spi_driver = { 476 .driver = { 477 .name = "wm8776", 478 .owner = THIS_MODULE, 479 .of_match_table = wm8776_of_match, 480 }, 481 .probe = wm8776_spi_probe, 482 .remove = __devexit_p(wm8776_spi_remove), 483 }; 484 #endif /* CONFIG_SPI_MASTER */ 485 486 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 487 static __devinit int wm8776_i2c_probe(struct i2c_client *i2c, 488 const struct i2c_device_id *id) 489 { 490 struct wm8776_priv *wm8776; 491 int ret; 492 493 wm8776 = devm_kzalloc(&i2c->dev, sizeof(struct wm8776_priv), 494 GFP_KERNEL); 495 if (wm8776 == NULL) 496 return -ENOMEM; 497 498 i2c_set_clientdata(i2c, wm8776); 499 wm8776->control_type = SND_SOC_I2C; 500 501 ret = snd_soc_register_codec(&i2c->dev, 502 &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai)); 503 504 return ret; 505 } 506 507 static __devexit int wm8776_i2c_remove(struct i2c_client *client) 508 { 509 snd_soc_unregister_codec(&client->dev); 510 return 0; 511 } 512 513 static const struct i2c_device_id wm8776_i2c_id[] = { 514 { "wm8776", 0 }, 515 { } 516 }; 517 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id); 518 519 static struct i2c_driver wm8776_i2c_driver = { 520 .driver = { 521 .name = "wm8776", 522 .owner = THIS_MODULE, 523 .of_match_table = wm8776_of_match, 524 }, 525 .probe = wm8776_i2c_probe, 526 .remove = __devexit_p(wm8776_i2c_remove), 527 .id_table = wm8776_i2c_id, 528 }; 529 #endif 530 531 static int __init wm8776_modinit(void) 532 { 533 int ret = 0; 534 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 535 ret = i2c_add_driver(&wm8776_i2c_driver); 536 if (ret != 0) { 537 printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n", 538 ret); 539 } 540 #endif 541 #if defined(CONFIG_SPI_MASTER) 542 ret = spi_register_driver(&wm8776_spi_driver); 543 if (ret != 0) { 544 printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n", 545 ret); 546 } 547 #endif 548 return ret; 549 } 550 module_init(wm8776_modinit); 551 552 static void __exit wm8776_exit(void) 553 { 554 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 555 i2c_del_driver(&wm8776_i2c_driver); 556 #endif 557 #if defined(CONFIG_SPI_MASTER) 558 spi_unregister_driver(&wm8776_spi_driver); 559 #endif 560 } 561 module_exit(wm8776_exit); 562 563 MODULE_DESCRIPTION("ASoC WM8776 driver"); 564 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 565 MODULE_LICENSE("GPL"); 566